Cratonavis zhui, a new species of pygostylian bird from the Early Cretaceous Jehol Biota of China, had a unique combination of a dinosaurian skull with an avialan post-cranial skeleton, revealing the key role of evolutionary mosaicism in early bird diversification. Life reconstruction of Cratonavis zhui. Image credit: Chuang Zhao. Cratonavis zhui lived in what is China during the Early Cretaceous epoch, approximately 120 million years ago. On the...
